Apparatus for printing



Aug. 19, 1941. g W T R 2,253,215

APPARATUS FOR PRINTING Original Filed April 8, 1939 3 Sheets-Sheet 1VIIIIIIIA \\\\\\\\\\"d I Inventor (/err se Z9? M/rer A tto rue OrieinalFiled April 8, 1939 s Sheets-Sheet 2 Inventor (/4rehc e lee l/a. //er AHome Aug. 19, 1941. c. L. WALTER APPARATUS FOR PRINTING 7 Original FiledA ril 8. 1939 3 Sheets-Sheet 3 Inventor Alton/e1 Patented Aug. 19, 1941APPARATUS FOR PRINTING Glarence Lee Walter, St. Louis, Mo.

Original application Ap 266,814. Divided and ril.8, 1939, Serial; No.thisapplication March 12, 1941, Serial No. 382,980.

2 Claims. (Cl. 103-114) invention relates, to improvements inprintingapparatus. for use. in printing from stencils according to. the methodforming the subject matter of my U. S. Letters Patent No. 2,245,629,dated January 17, 1941, and of which the instant application is adivision.

The invention is designed with the particular object in view ofproviding apparatus whereby pictorial illustrations, and also lines oftype, may be reproduced in a job press at a minimum cost.

Another object is to equip any platen type job press for printing from astencil, type high, and without any change in the basic design of theusual platen job press.

Other and subordinate objects are also comprehended by my invention, allof which, together with the precise nature of my improvements will bereadily understood when the succeeding description and claims are readwith reference to the drawings accompanying and forming part of thisspecification.

In said drawings- Figure 1 is a view in top plan of a pla'ten job) pressequipped according to my invention,

Figure 2 is a view in perspective illustrating the stencil sheet mountedin the stencil frame,

Figure 3 is a view in transverse section taken on the line 3--3 ofFigure 2 looking in the direction of the arrows,

Figure 4 is a view in side elevation illustrating the stencil framemounted in the press,

Figure 5 is a view in perspective of the inking p Figure 6 is a view insection of said pad,

Figure '7 is a view in vertical section, partly in front elevation,taken on the line 1-1 of Figure 4,

Figure 8 is a view partly in side elevation and partly in verticalsection taken on the line 8--8 of Figure '7, and

Figure 9 is a view partly in transverse section and partly in top planillustrating the inking pad fitted into the stencil frame and againstthe stencil sheet.

Referring to the drawings by numerals, according to my invention, aphotographic stencil sheet I of fibrous material, and otherwisecharacterized, as disclosed in my aforesaid copending application towhich attention is invited, is mounted in a stencil frame 2 of asuitable material, such as card-board, said frame having an opening 3formed therein slightly smaller than the stencil sheet and over whichsaid sheet is secured by gluing the edges thereof to said frame aroundsaid opening, as best shown in Figure 9.

The open frameZ constitutes a reinforcement on one side of the stencilsheet l. around the printing areasolely.

The stencil frame 2,, with, the stencil. sheet I therein, is. attachedin a press of the usual job printing type having the platen 4 operatedby the usual operating mechanism represented at 5, to close onto aprinted chase 6 locked in the press in the usual manner to be inked byinking rollers, not shown. In such presses, as will be understood, theplaten 4 carries a pair of work, or sheet, grippers 9 operative, bymechanism represented at Hi, to clamp opposite edges of the work sheet,not shown, to the platen 4 prior to closing of the press and to releasesaid sheet when the press is opened.

The stencil frame 2 is attached to one of said grippers 9 with thestencil sheet I facing the platen 4 and between the frame 2 and theplaten 4 so that when said grippers assume clamping position, said sheetwill lie flat aganist a work sheet imposed on the platen. For thispurpose, the stencil frame 2 is secured to the inner side edges of saidone gripper 9 to extend inwardly therefrom over the work sheetpreferably by means of a pair of thin, semi-rigid, resilient clips llspanning the gripper 9 and the upper and lower edges of the stencilframe 2 and clampingly engaging the gripper and frame so as to preventaccidental displacement of the latter.

An inking pad l2, for the stencil sheet I, is provided comprising ablock l3 of wood of the proper size to fit, with a slight clearance,into the stencil frame 2, said block being covered with a thin layer H!of sponge rubber faced with a layer [4 of smooth rubber. The describedinking pad I2 is clamped in the printing chase 6, covered sideoutermost, by any of the usual clamping means adjunctive to such forms,as represented at l5, and so as to press the stencil sheet I against thework sheet when the press is closed. The inking pad I 2 is of the properthickness to be type high so that it and the stencil sheet I may be usedin printing with the type it in the usual form clamped to the chase 6for job printing.

As will be understood, when the press opens up the inking rollers, notshown, will distribute ink over the inking pad l2 and when the presscloses up for the impression, the rubber layer I4 will enter the stencilframe 2, press against the stencil sheet I and thereby force ink throughthe fibrous area of the image, or pattern, onto the work sheet imposedon the platen soas to print the image on the work sheet. The inking pad[2 may be built up in the chase 6 to vary the tone of printing asdesired and in any suitable manner. The stencil sheet may be runseparately, or concurrently, with the printing of type. To remove thestencil frame 2 and stencil sheet I it is merely necessary to detach theclips I I.

The foregoing will, it is believed, suffice to impart a clearunderstanding of my invention, without further explanation.

Manifestly the invention, as described, is susceptible of modificationwithout departing from the inventive concept and right is hereinreserved to such modifications as fall within the scope of the subjoinedclaims.

What I claim is:

1. In printing apparatus, a chase, a type form clamped therein, a worksupporting platen movable toward and from the form to eifect printing, astencil having a printing area pervious to ink, means to support saidstencil in front of the work operative to engage one face of the stencilwith the work during movement of the platen toward the form, a type highinking pad in said chase for engagement with the other face of saidstencil under movement of the platen to force the work during movementof the platen toward the form, a type high inking pad in said chase forengagement with the other face of said stencil under movement of theplaten to force ink therethrough onto the work simultaneously withprinting by said type on the work, said means including a stencilsupporting frame having an open side facing said pad, and said padfitting into said frame against the stencil, said pad including a layerof sponge rubber, and a smooth resilient facing sheet covering saidlayer.

. CLARENCE LEE WALTER.

